Scotland Deploys World's Largest Tidal Energy Array TidalGrid: 200 Underwater Turbines Power 300,000 Homes

Scotland Deploys World's Largest Tidal Energy Array TidalGrid: 200 Underwater Turbines Power 300,000 Homes

Simec Atlantis Energy announced on October 9 that the world's largest tidal energy array, TidalGrid, has completed deployment and been officially connected to the grid in Scotland's Pentland Firth. The array consists of 200 underwater turbines with a total installed capacity of 600 megawatts, expected to provide stable clean electricity for approximately 300,000 households annually.

The Pentland Firth is one of Europe's fastest tidal current waters, with maximum flow speeds reaching 5 meters per second. Each turbine has a diameter of 20 meters, installed 25 meters below the surface. Unlike wind power, tidal energy offers extremely high predictability — tidal cycles are determined by lunar gravity, allowing power output to be precisely predicted years in advance.

TidalGrid's construction took four years with a total investment of 1.8 billion pounds. The project received UK government Contract for Difference (CfD) support with a guaranteed electricity price of 178 pounds per megawatt-hour. The Scottish government stated that TidalGrid's success demonstrates the large-scale commercial viability of tidal energy, with plans to increase tidal energy capacity to 2 gigawatts by 2035.